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I N D U S T R I E S
ACTS-12K AUTOMATIC CAPACITANCE & TAN DELTA TEST SET
OOPPEERRAATTIIOONN && IINNSSTTRRUUCCTTIIOONN
MMAANNUUAALL FFOORR SSOOFFTTWWAARREE VVEERRSSIIOONN 11..88..22
&& AABBOOVVEE
RReevviissiioonn -- 11
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I N D U S
AAUTOMATIC CAPACITA
OOPPEERRAATTIIOOFFOORR SSOOFFTTWWAA
EElltteell IInndduussttrriieess iiss aann IISSOO 99000011
--22000000 COPY R Registered Company.
Office : ELTEL Industries, 311, Embassy Centre, Crescent Road,
Bangalore - 560 001. INDIA
Tel : 91-80-22255467, 22205686, 22284298, 22284253 Fax :
91-08-22252733 E-mail : [email protected]
Website: http://www.e T R I E S
CTS-12K NCE & TAN DELTA TEST SET NN &&
IINNSSTTRRUUCCTTIIOONN MMAANNUUAALL RREE VVEERRSSIIOONN 11..88..22
&& AABBOOVVEE
RReevviissiioonn 11 AApprriill 2244,, 22000066..
IGHTELTEL INDUSTRIES, 2006 All rights reserved. Printed in
INDIA
Factory : ELTEL Industries, Plot # 39, KIADB Industrial Area,
Veerapura, Doddaballapur, Bangalore - 561 203. INDIA
Tel : 91-80-27630350, 27630366, 27630367, 27630368 Fax :
91-08-27630351 E-mail : [email protected]
ltelindustries.com
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Table of Contents I. OPERATOR SAFETY.. 1 II. DESCRIPTION .. 1
III. GROUNDING .. 1 IV. POWER CORD AND FUSES.. 1 Chapter 1.
INTRODUCTION .. 2
1.1 Description .. 2 1.2 Applications .. 3 1.3 Features .. 3 1.4
System Specifications . 4 1.4.1 Measuring Bridge . 4 1.4.2 Power
Source . 5 1.4.3 Cables . 6 1.5 Additional Specification .. 6 1.5.1
Test Functions . 6
1.5.2 Interference . 6 1.5.3 Printer port . 7 1.5.4 RS-232
Interface . 7
1.6 Available Optional Accessories .. 7 1.6.1 Oil Cell . 7
1.6.2 Calibrator . 7 1.6.3 Range Extension Transformer . 7 1.6.4
Compensating Reactors . 7 Chapter 2. INSTALLATION 8 2.1 Unpacking
and Inspection .. 8 2.2 Preparation for use .. 8 2.3 Line Supply
Voltage .. 8 2.4 Safety Considerations . 9 2.5 External Connections
. 9 2.5.1 RS-232 Connector 10 2.5.2 Centronix Parallel port
(Printer port) . 11 2.6 Repacking and shipment . 12
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OPERATION & INSTRUCTION MANUAL ACTS-12K Chapter 3. OPERATION
. 13 3.1 Power Source .. 13 3.1.1 Front panel .. 13 3.1.2 Rear
panel .. 16
3.2 Bridge .. 19
3.2.1 Front panel .. 19 3.2.2 Rear panel .. 21
3.3 Menus and Options Overview .. 23 3.3.1 Measure C&DF.. ..
24
3.3.2 Measure Excitation... 24 3.3.3 Selections... 25
3.4 Description of different measurement modes .... 28 3.4.1
Measure C&DF.. .. 28
3.4.2 Measure Excitation... 31 3.4.3 Range Extension... 31 3.4.4
Selections. . 31 3.4.5 Cable Connections... 31
3.5 Service and maintenance ..... 31 Chapter 4. PRECAUTIONARY
MEASURES. 32
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ACTS-12K
on c upport Department for
grading a product
upport representative may be reached at :
rea, apur,
ore - 561 203 A
630366, 27630367, 27630368 51
o return ELTEL product (in-warranty and out-of-warranty) for
repair or replacements.
1. representative with model number,
2. amaged during shipping, pack the product in its
prepaid).
or more information regarding the warranty policies, refer to
disclaimer page.
Preface About this manual
This manual describes the installation and operation of the
ELTEL ACTS-12K. This is a technical document intended for testing
engineers, technicians and operators responsible for the operation
and maintenance of ACTS-12K.
Regarding comments or suggestions concerning this manual.
Comments and suggestions regarding the content and design will be
appreciated. To submit comments, please contact the ELTEL Customer
Support Department according to the following information.
Customer Support C ta t ELTEL Customer S
Product information Information on returning a product
Information on up Product training Reporting comments or
suggestions concerning manuals.
An ELTEL Customer S ELTEL INDUSTRIES Plot #. 39, KIADB
Industrial AVeerapura, DoddaballBangalINDI Tel : 91-080-27630350,
27Fax : 91-080-276303E-mail : [email protected] T
Be prepared to supply the Customer Support serial number and a
description of the problem. To ensure that the product is not
doriginal shipping carton/packaging.
3. Ship the product back to ELTEL Industries (Shipping charges
should be F
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ACTS-12K
WARRANTY POLICY ELTEL Industries product warranted against
defects in material and workmanship for a period of one year from
the date of shipment. During the warranty period, ELTEL will, as
its option, repair or replace products that prove to be defective.
For requirement under warranty, the customer is responsible for
freight to ELTEL and all related customs, taxes, tariffs,
insurance, etc. ELTEL is responsible for the freight charges only
for the return of the equipment from the factory to the customer.
ELTEL warrants that its software and firmware designated by ELTEL
for use with our instrument will execute its programming
instructions when properly installed on that instrument. ELTEL does
not warrant that the operation of the instrument, or software, or
firmware will be uninterrupted or error free.
LIMITATIONS OF WARRANTY The foregoing warranty shall not apply
to defects resulting from improper installation or maintenance,
abuse, unauthorized modification or operation outside of
environmental specifications for the product, or, for damage that
occur due to improper repackaging of the equipment for return to
ELTEL. No other warranty is expressed or implied. ELTEL Industries
specifically disclaims the implied warranties or merchantability
and fitness for particular purpose.
EXCLUSIVE REMEDIES The remedies provided herein are the buyers
sole exclusive remedies. ELTEL Industries shall not be liable for
any direct, indirect, special, incidental or consequential damage,
whether based on contact, trot or any other legal theory.
Disclaimer ELTEL has reviewed this manual thoroughly in order
that it will be an easy-to-use guide to your equipment. All
statements, technical information and recommendations in this
manual and in equipment guides or related documents are believed
reliable, but the accuracy and completeness thereof are not
guaranteed or warranted and they are not intended to be, nor should
they be understood to be, representations or warranties concerning
the products described. Further, ELTEL deserves the right to make
changes in the specifications of the product described in the
manual at any time without notice and without obligation to notify
any person of such changes. If you have any questions regarding
your equipment or the information in this manual, please contact
ELTEL Industries. (For more information, refer to the preface.)
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OPERATION & INSTRUCTION MANUAL ACTS-12K
I OPERATOR SAFETY
ATTENTION: READ THIS MANUAL BEFORE PROCEEDING WITH INSTALLATION
AND OPERATING THE INSTRUMENT.
II DESCRIPTION
This instrument must be operated, used and serviced ONLY by
trained, qualified personnel. Misuse of electrical instrument can
result in personal injury and damage to the apparatus under test.
Obey all applicable safety rules and regulations at all times.
Refer to the following sections of manual for operating
specifications and procedures.
III GROUNDING
MAKE CERTAIN THAT THE THIRD PIN OF POWER-IN CONNECTOR SHOULD BE
AT THE SAME POTENTIAL AS THAT OF THE SYSTEM GROUND/ EARTH. CONNECT
GROUND LEADS TO THE INSTRUMENT PRIOR TO MAKING OTHER CONNECTIONS.
WARNING: TO AVOID ELECTRIC SHOCK DO NOT INTERRUPT THE CONNECTION TO
THE PROTECTIVE SAFETY GROUND.
IV POWER CORD
The power cord must be connected to a ground supply system with
proper electric ratings, as mentioned in the manual. WARNING: TO
AVOID ELECTRIC SHOCK ALWAYS DISCONNECT THE POWER CORD FROM THE
SUPPLY CIRCUIT BEFORE SERVICING THE INSTRUMENT.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Chapter 1.INTRODUCTION
This chapter describes the purpose, function, description and
system specifications of ACTS-12K Automatic Capacitance and Tan
Delta Test Set.
1.1 Description The Eltel Model Automatic Capacitance & Tan
Delta Test Set (Model ACTS-12K) is an instrument designed to
conduct power factor tests on electrical insulation. The test set
is capable of automatically measuring the insulation power factor
of multi-terminal equipment at voltages ranging from less than 1KV
up to 10KV. Being equipped with two measuring leads, the test set
can measure all the quantities necessary to complete an insulation
power factor test report for two, three and multi-terminal
electrical power equipment. The ACTS-12K operates on the
Transformer Ratio Arm Bridge principle. The current from the device
under test is compared to the current of an internal reference
capacitor. The residual of this comparison is measured and resolved
into in phase (watt loss) and quadrature current components. The
test voltage and total specimen current are also measured. From
these measured quantities,
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OPERATION & INSTRUCTION MANUAL ACTS-12K
power factor and capacitance are calculated and displayed along
with the test voltage, total current and watt loss. The test set
features interference measuring and suppression circuitry. When
activated by the operator, the circuitry automatically measures and
suppresses interference that may be present on the test specimen.
This greatly reduces operator intervention and improves accuracy
and consistency of test results. The test set provides information
on: * Voltage * Current * Capacitance * Power * Power
factor/Dissipation factor * Frequency * Interference Current 1.2
Applications Power factor testing of electrical insulation is one
of the most recognized and highly regarded procedures in both
preventive maintenance process and manufacturing of electrical
power apparatus, such as transformers, reactors, circuit breakers,
electromechanical rotating machines etc. The power factor of
electrical insulation, the ratio of power loss to volt-ampere, is a
measure of the quality of the insulation. It is with this in mind
that the electrical power industry is monitoring the power factor
of their major system components to avert unwanted failures and
outages. 1.3 Features Rugged Compact Design; two vibration and
shock resistant cases. Semi Automatic Operation; Instrument self
balances and guides the
operator by means of menu driven Alpha-numeric display Keyboard
entry of parameters. Digital display of test results on 240 X 128
dot back-lit LCD display. RS-232C computer interface. Centronix
parallel port printer interface. Automatic Ranging. Auto print
facility. Flexible cold weather cable Direct Reading; no
calculations to perform, equivalent to 2.5KV / 10KV
results also displayed. Capable of performing all UST and GST
tests. Operates Accurately in Hostile Electrical Environments; will
function in
stations to 700KV.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
1.4 System Specifications 1.4.1 Measuring Bridge
1. Capacitance : Range Range Extension Accuracy Resolution
:: : :
0 to 0.26F External Range extender to increase capacitance range
up to 2.6F 0.2% of reading 1pF (UST) 0.2% of reading 10pF (GST) 4
digits
2. Dissipation Factor
: Range Accuracy Readout Highest Resolution
::::
0 to 1% of reading 0.05% 5 digits 0.00001, DF display is in
absolute value or percentage
3. Power : Range Accuracy Readout Highest Resolution
::::
0 to 2 kW 1% of reading 4 digits 1W
4. Interference Current
: Range Accuracy Readout Highest Resolution
::::
0 to 100mA 1% Absolute or Percentage 1A
5. Power factor : Range Accuracy Readout Highest Resolution
::::
0 to 100 % 1% of reading 0.05% 5 digits 0.00001, PF display is
in absolute value or percentage
6. Voltage : Range Accuracy Resolution
:::
0 to 12000 volts 1% of reading, RMS responding 1 volt
7. Current : Range Accuracy Resolution
:::
0 to 2000 mA 1% of reading 1A
8. Frequency : Operation Range Accuracy Resolution
:::
45 to 65 Hz 0.02 Hz 0.01 Hz
9. Display : 240X128 dot back - Lit LCD panel 10. Key board : 20
key membrane Key board
11. Measurements Measures UST GSTwith Ground GST with Guard
: UST, GST with Ground, GST with Guard H-L; H-T; H-(L+T)
H-(L+T+G) H-G; H-(L+G); H-(T+G)
UST (3 positions) GST (1 position) GST-g (3 positions)
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OPERATION & INSTRUCTION MANUAL ACTS-12K
1.4.2 Power Source 1. Power input : 230V 10%, 50 Hz, 1.2 KVA
(2.4 KVA
intermittent) OR 110V 10%, 60 Hz, 1.2 KVA (2.4 KVA
intermittent)
2. HV OUTPUT
Tap # 1 : 0 to 12000 volts @ 100mA(200mA intermittent) Tap # 2 :
0 to 2400 volts @ 500mA(1000mA intermittent)
Both the 12kV and 2.4kV voltage taps are available for C &
DF as well as the excited current measurements. 3. Reference
Capacitor: 200 pF Standard Capacitor with guard circuit 4. Power
Transformer : Double shielded, air insulated construction 5.
Built-in Safety features
The ACTS-12K has many built-in safety features, these
include:
1.ZERO START Interlock: Operator is required to place voltage
output variac to zero before high voltage can be initiated
2.OPERATOR HAND SWITCH Interlock: Operator involved with lead
connections to test apparatus has control of high voltage
initiations and de-activation at all times.
3.FOOT SWITCH INTERLOCK: Operator involved with operation of
ACTS-12K has interlock control via foot switch of both activation
and de-activation of high voltage output. 4.DOUBLE GROUND
PROTECTION: ACTS-12K must be connected to a suitable ground for
initiation of high voltage output.
5.HV OFF (EMERGENCY STOP): At any time during testing, high
voltage can be immediately shut down by depressing this button. The
ACTS-12K will not be able to be turned on until this button is
released from a locked position.
6.SHORT CIRCUIT PROTECTION: At any time, if any short between HV
& LV and / or HV & Ground, the instrument will trip.
7.OVER VOLTAGE PROTECTION: If the operator exceeds the maximum
specified voltage of 12kV, the instrument will trip in a fraction
of seconds.
8.OVER TEMPERATURE PROTECTION: If the power transformer (Inside
the power source) overloaded beyond the design limits, the
instrument will trip.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
9.INDICATORS
1.POWER ON TWO RED LAMPS (SMALL) 2.HV ON TWO RED LAMPS (BIG)
3.OPEN GROUND ONE RED LAMP 4.OPEN INTERLOCK ONE RED LAMP 5.OVER
TEMPERATURE ONE RED LAMP 6.OVER VOLTAGE with Reset ONE RED LAMP
7.SHORT CIRCUIT with Reset ONE RED LAMP
6. MECHANICAL DATA:
Size : 19 " rack, 7 " high, 12" deep approx.
Weight : Approx. 65 Kgs. 7. OPERATING TEMPERATURE : 0 to 50C. 8.
HUMIDITY : 0 to 90%, non condensing. 1.4.3 CABLES
High Voltage cable (12KV) of 20m, length double screened and
equipped with clips and hooks
Two Low Voltage leads of screened cable of 20m, length equipped
with clips and hooks
Two grounding cables of 20m & 10m length equipped with clip.
Foot switch used for safety of operator while handling high
voltage;
equipped with 5m length cable Mains connecting cable of 10m
length One set of interconnecting cables
1.5 ADDITIONAL SPECIFICATION
1.5.1 TEST FUNCTIONS
The following test functions are provided with each test set: 1.
Measurement without interference suppression 2. Measurement of
interference suppression 3. Range Extension measurement
1.5.2 INTERFERENCE
Automatic cancellation of interference when enabled by the
operator. The accuracy of measurement is reduced with increased
interference levels. The instrument measures and displays the
quantity of interference.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
1.5.3 PRINTER PORT
The instrument provides an optically isolated compatible
parallel printer port. The test data is printed out on two lines
and may be the 2.5KV or 10KV equivalent readings, or may be the
actual reading at the measured test voltage (as selected by the
operator).
1.5.4 RS-232C INTERFACE
The standard RS-232C data port can be used to transmit test
results to a personal computer.
The data output includes:
- Type and mode of measurement taken - Test results at the set
test voltage or - 2.5kV or 10kV equivalent test results
1.6 AVAILABLE OPTIONAL ACCESSORIES
1.6.1 OIL CELL
A 10KV Oil Cell is available for the instrument to test the oils
at room temperature. The cell gap is 11 mm, nominal. The cell
capacity is 2000 ml.
1.6.2 CALIBRATOR
A 200pF calibrator that provides power factors over the range of
0-10% is available (0,0.1,0.3,1,3,10%). The calibrator is useful up
to 10KV.
1.6.3 RANGE EXTENSION TRANSFORMER (CTS-RE)
The Capacitance Range Extension Transformer (CTS-RE) is a
precision current transformer, especially designed for use with the
ACTS-12K to extend its range of capacitance measurement. The
provided ratios are 1000, 500, 200, 100 to 1.
1.6.4 COMPENSATING REACTORS
The use of one or more compensating reactors increases the
capacitance that the internal power supply can excite to conduct
measurements. The reactors are available in two ratings: 104
Henries at 300mA, for compensating 0.1F (MODEL CTS-100) 52 Henries
at 600mA, for compensating 0.2 F (MODEL CTS-50)
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Chapter 2.INSTALLATION
This chapter provides the following information:
Unpacking and Inspection Preparation for use Line supply voltage
Safety considerations External Connections Repacking and
shipment
2.1 Unpacking and Inspection
The Model ACTS-12K Power Source and Bridge are packed in
pre-formed reusable foam inside an Aluminium Carrying cases. Cables
and Instruction Manual are packed in a Plastic Box. For shipment,
all the three boxes are packed in Cardboard cartons. Prior to
shipment this instrument is electrically tested and mechanically
inspected and found to meet specifications and be free of
mechanical defects.
After unpacking the instrument, visually inspect the instrument
and accessories for damage. If evidence of damage is present, you
must contact the carrier who transported the unit and file a claim
in writing. The carriers agent should retain the shipping container
and packing material for inspection. Electrical operation should be
checked as soon as possible after receipt of the instrument.
2.2 Preparation for use
ENSURE THAT THE APPARATUS TO BE TESTED IS CLEARED AND
DE-ENERGIZED PRIOR TO TEST. It is highly recommended that the user
become familiar with the controls, functions and features of the
instrument before use of the Kit.
2.3 Line supply voltage
This instrument is shipped from the factory for operation on
either 230V, 50Hz line or 120V, 60Hz line (Set at Factory). Other
input voltages available upon request.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
2.4 Safety Considerations
CAUTION!!
This instrument is capable of generating LETHAL VOLTAGES.
Extreme care should be used in operating this unit.
WHEN TESTING IN HIGH VOLTAGE ENVIRONMENT, IT IS ABSOLUTELY
ESSENTIAL THAT ALL TEST APPARATUS HAVE SAFETY GROUND CONNECTIONS
INSTALLED, BEFORE CONNECTING THE ACTS-12K TEST LEADS. THE ACTS-12K
PROTECTIVE GROUND TERMINALS MUST BE CONNECTED TO A GOOD EARTH
GROUND PRIOR TO MAKING ANY OTHER CONNECTIONS TO THE INSTRUMENT.
TURN OFF THE INSTRUMENT WHENEVER INTERCONNECTIONS TO THE OUTPUT
TERMINALS OR THE TEST SPECIMEN ARE BEING MADE.
THE HIGH VOLTAGE AND MEASURING LEADS SUPPLIED BY ELTEL SHOULD BE
USED WITH THIS INSTRUMENT.
OBEY ALL APPLICABLE SAFETY RULES AND REGULATIONS AT ALL TIMES
!!!
2.5 External Connections
The Test Set consists of two units, namely (a) Power Source and
(b) Measuring Bridge. However, optionally these two units can be
housed in a 19" Rack mount chassis. The test connection leads can
be stored in the Rack chassis, in the space at the bottom of the
stacked-up units, accessible from the rear door of the chassis.
The CxL leads (co-axial leads with yellow and blue) are
connected to the Bridge measuring arms and are the sensitive leads
of the Bridge concerning the influence of stray capacitance.
The following is a general procedure for operating ACTS-12K:
1. Connect the Ground Stud terminal to a low impedance earth
ground using the 10 meter ground cable supplied with the Test
Set.
2. Using the two short leads of co-axial cable, connect Cn of
Bridge to Cn of Power Supply.
3. Connect the 20 meter co-axial cable with yellow mark to the
CxL yellow terminal of the Bridge.
4. If required connect the 20 meter co-axial cable with blue
mark to the CxL blue terminal of the Bridge.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
5. Connect the 20m high voltage cable to the HV OUT terminal of
the Power Source (Capacitance and Dissipation Factor
measurements)
6. Connect the 5m control cable, with Foot-switch, to one of the
terminals marked Foot switch. A plug, short-circuited should be
inserted in the Interlock receptacle. However, this may also be
used for connection to a safety Interlock switch.
7. Connect the power input receptacle of the Bridge to the Power
out receptacles of the Power Source, using the two meter Extension
cord supplied with the Test Set.
8. Connect the Input receptacle of the Power Source to the AC
power source, using the 10 m input power cable supplied with the
Test Set.
9. Connect the ground terminal of the Bridge to ground terminal
of the Power Source via two meter cable provided with the Test
Set.
10. Connect the guard terminal of the Bridge to guard terminal
of the Power Source via two meter cable supplied with the Test
Set.
11. Interconnect the Test Polarity receptacles using two meter
cable provided with the Test Set. 12. Connect the high voltage lead
to high voltage connector of POWER SOURCE. Take precaution not to
place too much strain on this cable as it will reduce its life
expectancy. Also keep HV connectors clean and free of moisture.
13. Plug in the provided line cord to a suitable source
14. Instrument is now ready to turn on.
2.5.1 RS-232 Connector The RS-232 interface is been provided on
a 9-pin female D-Connector and is been used to interface with PC.
Refer to Table 2-1 for connector pin out. The RS-232 connector is a
DCE interface. Screw locks are been provided for mechanical
security of the mating connector.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Table 2-1 RS-232 connector pin outs
Pin # Name 1 NC 2 TX1 3 RX1 4 NC 5 GND 6 NC 7 TX2 8 RX2 9 NC
2.5.2 Centronix Parallel port (Printer Port)
The Centronix port is been provided on a 25 pin female
D-connector and is been used to interface with any 80 column
printer for data transfer. Refer to Table 2-2 for connector
pinouts.
Table 2-2 Centronix Parallel Port
PIN SIGNAL I/0 DEFINITION 1 STB # O Strobe 2 PD0 I/O Parallel
data bit 0 3 PD1 I/O Parallel data bit 1 4 PD2 I/O Parallel data
bit 2 5 PD3 I/O Parallel data bit 3 6 PD4 I/O Parallel data bit 4 7
PD5 I/O Parallel data bit 5 8 PD6 I/O Parallel data bit 6 9 PD7 I/O
Parallel data bit 7 10 ACK # I Acknowledge 11 BUSY I Busy 12 PE I
Paper end 13 SLCT I Select 14 AFD # O Automatic feed 15 ERR # I
Error 16 INIT # O Initialize printer 17 SLIN # O Select in
18-25 GND N/A Signal ground Shell GND N/A Frame ground
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OPERATION & INSTRUCTION MANUAL ACTS-12K
The examples of print images sent to the receiving device are
been shown below: ELTEL ACTS-12K Ser. No. __________
DD/MM/YY Specimen #: NORMAL, 2 UST B, V= -----V, I= ------mA, C=
-------pF, P= ------mW PF= -------, DF= --------, F= -------Hz, In=
------%
2.6 Repacking And Shipment
To ensure proper shipment of this instrument, it is recommended
that the original reusable container and packing material be
retained. If being returned for calibration or service, please
attach a card to the instrument specifying the owner, model and
serial number and service required.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Chapter 3.OPERATION
This Chapter provides the following information Power Source
Front panel & Rear panel Bridge Front panel & Rear panel
Menus and Options overview Description of different measurement
modes Description of different measurements Service and maintenance
3.1 POWER SOURCE
3.1.1 Front panel
The front panel of the Power Source has the following features.
The location of the controls on the panel is shown in Figure
3-1.
1. POWER SWITCH:
This two-pole circuit breaker is used as On/Off for the Power
Source. It controls power supply to the entire system.
2. RED AC ON LAMPS:
These lamps are used to indicate that the Power On switch is in
the ON position and that the Test Set is energized from the line.
It will not light up when there is no power supplied to the Test
Set.
3. HV ON SWITCH:
This is a push button switch, which controls the operation of an
internal line contactor and two HV ON red indicator lamps. External
Interlock and Foot-switch cables must be connected to their
receptacles in the rear panel. Foot-switch must be closed, the
Voltage Control set to zero, the Open Ground and Over temperature
and short circuit lamps must be out, the HV OFF switch must be
released in order for the switch to perform its function. Also the
Test Polarity switch in the Bridge Front panel must be set to
Forward or Reverse position. When the switch is operated, the two
HV ON red indicator lamps will light and test voltage may be
applied by the Voltage Control.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
HV
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Figure 3-1 Front Panel of Power Source
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OPERATION & INSTRUCTION MANUAL ACTS-12K
4. RED HV ON LAMPS: These lamps are used to indicate that
voltage is capable of being applied by clockwise rotation of the
Voltage Control. They will light when the ON Output Voltage push
button switch is operated. They will go out and remain out, if
power is removed from the input of the Test Set, if the OFF Output
Voltage push button switch is operated. If the POWER ON circuit
breaker switch is turned OFF, if the Foot-switch is opened or the
shorting plug is taken out of the External Interlock receptacle, if
the Open Ground is lit or if the Transformer Overload lamp is
lit.
5. VOLTAGE CONTROL:
The control is a variable ratio autotransformer used to adjust
the output voltage of the Test Set by controlling the primary
voltage of the power transformer. It functions in conjunction with
a zero start switch which requires the control shaft to be in the
counter clockwise ("O") position prior to the ON Output Voltage
switch becoming operative.
6. HV OFF SWITCH:
This is a push button switch is used to de-energize the line
contractor which turns off the test voltage. The red pilot lamps
should go out when the OFF switch is operated. It performs the same
function as opening the Foot-switch.
NOTE: The HV OFF switch locks in the down position and must be
re-set by turning it clockwise before power can be applied
again.
7. OPEN GROUND LAMP:
If the Open Ground lamp comes On, it indicates the ground
circuit power cable is open, or that the ACTS-12K (The System) is
improperly grounded by the ground cable. The lamp will also come ON
in the event of a high resistance ground between the ground cable
and the power cable ground. The power supply cannot be energized
with high voltage with an Open Ground.
8. OVER TEMP. LAMP:
This is a red lamp used to indicate thermal overload of the
power transformer beyond the design limits. If extended overload
occurs, a thermal protective relay will operate causing the
Transformer Over Temperature Lamp to come ON. The red HV pilot lamp
should then go out. This performs the same reaction as opening the
Foot-switch. The HV ON push button switch will not function under
this condition until the transformer temperature has returned to
normal. At this time the overload relay will automatically re-set,
and it is indicated by the Transformer Over Temp. lamp going out.
The Test Set can then be re-energized by operation of the POWER ON
switch.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
9. OPEN INTERLOCK LAMP: This red lamp indicates the state of the
External Interlock and footswitch. The lamp will be ON if the
Interlock or the footswitch is open.
10. OVER VOLTAGE LAMP:
This red lamp indicates that the operator has exceeded the
maximum specified voltage of 12kV and the power supply will trip in
a fraction of a second. Then the operator should bring down Voltage
control to start and press the reset switch to initiate the
measurement.
11. SHORT CIRCUIT LAMP:
This red lamp comes on when the internal impedance relay will
trip if there is a short on the high voltage output transformer or
if the connected capacitance is too large. The operator should
remove the shorted specimen or redo the fallen connection before
pressing the reset switch.
12. RESET SWITCH:
The red push button switch is provided for setting OFF the Over
voltage and Short Circuit lamps after taking the necessary action
as mentioned under sections 11 & 12 above.
3.1.2 Rear panel
The rear panel of the power source has the following features.
The location of the controls on the panel is shown in figure
3-2.
1. Bridge Power Receptacle: (Power out Receptacle):
This receptacle is energized with line voltage when the POWER ON
Breaker is in the ON position and is used to supply input power to
the Bridge via the extension cable supplied with the set.
2. Cn Receptacle:
The three pin audio connector is used to inter-connect the
Bridge and Power Source, via shielded cable for Capacitance &
Dissipation Factor measurements.
3. Ground Terminal:
It is also connected to the specimen ground via a 20-meter
cable. Its connected to the bridge via a 2-meter cable
4. Guard Terminal:
Guard terminal is provided for measurement of
multi-winding/terminal specimens. Its connected to the Guard
terminal of the bridge via a inter-connected 2-meter cable.
16
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OPERATION & INSTRUCTION MANUAL ACTS-12K
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Figure 3-2 Back Panel of Power Source
17
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OPERATION & INSTRUCTION MANUAL ACTS-12K
5. Test Polarity input receptacle: Its connected to the bridge
counterpart via a 2-meter cable
6. Power in Receptacle:
This receptacle is used to connect the System to an AC power
source, via the Power Supply input cable.
7. Foot-switch and External Interlock Receptacles:
A 5-meter cable with a Foot-switch and a short-circuited
Interlock plugs are connected to those receptacles.
8. HV OUT Receptacle:
This is the high voltage output terminal used for normal
Capacitance and Dissipation Factor measurements. It is connected to
the test specimen via the high voltage test cable. The outer shield
of this cable, terminated with a pigtail lead, should be connected
to the Ground Stud.
9. 12kV Tap Selector:
One can select the 12kV for the measurement by inserting the
shorting plug in to the 12kV tap selector.
10. 2.4kV Tap:
One can select the 2.4kV for the measurement by inserting the
shorting plug in to the 2.4kV tap selector.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.2 BRIDGE 3.2.1 Front panel
Refer to Figure 3-3.
The ACTS-12K is locally operated by using the front panel
keypad. The keyboard consists of 20 keys, each of which has its own
logical function or functions refer to table 3-1.
Table 3-1 Definition of Front Panel Key pad.
KEYS FUNCTION OF KEYS ON KEYPAD 09 Used for data entry.
[ENTER] is used to execute a function. ESC ESC used to pack out
selections or cancel the configuration that
has not been executed by Enter. Pressing this key generally
returns the display to the previous selection.
F1 To view Results, Repeat the Test. F2 Check the Results. F3 To
print out the final result. Decimal point.
Used for increment or decrement Increase or decrease intensity
of LCD back light and also vary
cursor in Customer settings menu. The ACTS-12K responds by
beeping whenever a key is pressed A single beep indicates that the
key pressed was a valid entry and the
appropriate action was taken A double beep indicates that the
key pressed was an invalid entry. A long beep indicates that the
values entered are stored in memory. The front panel control uses a
tree-structured menu systems (Figure 3-5) to access and execute all
functions. The base level of this structure is sign-on message,
which is displayed on the front panel ACTS-12K power-up. The main
level of the menu system is the measurement mode menu, which is
accessed from the base level by pressing key. From the Measurement
mode menu the user may select any one of Six functions.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
1
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OFF
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Figure 3-3 Front Panel of ACTS-12K Bridge
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.2.2 Rear panel
The rear panel of the bridge has the following features. The
location of the controls on the panel is shown in figure 3-4.
1. Power In Receptacle:
The bridge is powered from Power Source. A two meter cable power
cord interconnects the power out of the Power Source and power in
of the Bridge.
2. Cn Receptacle:
The three pin audio connector is used to inter-connect the
Bridge and Power Source, via shielded cable for Capacitance &
Dissipation Factor measurements.
3. CxL Blue and CxL Yellow Receptacles:
These are low voltage co-axial terminals used for normal
Capacitance and Dissipation Factor measurements. They are connected
to the Test Set specimen via the yellow and blue low voltage test
cables.
NOTE: A single test cable is used when measuring a specimen,
which has only two terminals plus a ground.
4. Ground Terminal:
It is connected to the low impedance earth ground via a 10 meter
cable. It is also connected to the Power Source Ground post via a 2
meter cable
5. Guard Terminal:
Guard Terminal is provided for measurement of
multi-winding/terminal specimens. Its connected to the Guard
terminal of the Power Source Guard via a 2 meter cable
6. Test Polarity output receptacle:
Its connected to the Power Source counterpart via a 2 meter
cable
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OPERATION & INSTRUCTION MANUAL ACTS-12K
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Figure 3-4 Back Panel of ACTS-12K Bridge
22
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.3 Menus and Options Overview
PRESS 1 PRESS 5
CABLE CONNECTION
PRESS 4
SELECTIONS
PRESS 3
RANGE EXTENSION
PRESS 2
MEASURE EXCITATION
MEASURE C&DF
ELTEL ACTS - 12K
Automatic Capacitance and Tan Delta Test Set
Version 1.8 1 Copyright 1998 by
ELTEL INDUSTRIES
Press any key to continue
Figure 3-5 Main Menu
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.3.1 Measure C&DF Press 1 for selecting Measurement, as
given below:
GST BG 7
GST YG 6
GST G 5
Enter F2 Check F1 ViewRes
4 GST YBG
3 UST YB
1. MEASURE C&DF
2 UST B
1 UST Y
Figure 3-6
3.3.2 Measure Excitation
Press 2 for selecting Measure Excitation, as given below:
GST BG 7
GST YG 6
GST G 5
Enter F2 Check F1 ViewRes
4 GST YBG
3 UST YB
2. MEASURE EXCITATION
2 UST B
1 UST Y
Figure 3-7
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.3.3 Selections
Press 3 for selections, as given below:
ABSDF%
ON2 REAL
ON110KV2.5KV
OFF
4. SELECTIONS
1 AUTOPRINT2 SEL. PRINT3 LOSS 4 LOSS VIEW 5 BACK LIGHT6
DATE/TIME PROPERTIES7 SPECIMEN #
PF
Figure 3-8 From the ACTS-12K main menu, pressing any key will
display the first menu. Now press 4 which is the selection menu to
enter and select the parameters as desired.
In the selections menu :
1. Auto print: In this, three different printout selections are
available, namely OFF, ON1, ON2. The operator can select any one by
pressing 1. If 1 is pressed again, the cursor will move one
position for each time. a) If the selection is OFF, the operator
should give print command by pressing F3 after the execution of the
selected measurements is completed. The sample printout will be, as
follows: ELTEL ACTS-12K Ser. No. __________ DD/MM/YY Specimen #:
NORMAL, 2 UST B, V= -----V, I= ------mA, C= -------pF, P= ------mW
PF= -------, DF= --------, F= -------Hz, In= ------% b) If the
selection is ON1, the operator will get the on-line printouts. The
printout consists of Forward test results, Reverse test results and
Final result. The sample print out will be as follows:
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OPERATION & INSTRUCTION MANUAL ACTS-12K
ELTEL ACTS-12K Ser. No. __________ DD/MM/YY Specimen #: +HV,
NORMAL, 2 UST B, V= ----V, I= ----mA, C= -----pF, P= -----mW PF=
-------, DF= --------, F= -------Hz, In= ------%, N= ---, M=
------HV, NORMAL, 2 UST B, V= -----V, I= ----mA, C= -----pF, P=
----mW PF= -------, DF= --------, F= -------Hz, In= ------%, N=
----, M= ---- FINAL, NORMAL, 2 UST B,V= ----V, I= ----mA, C= ---pF,
P= ----mW PF= -------, DF= --------, F= -------Hz, In= ------% In
the above print out N and M represent the number of turns selected
in N and M windings of the internal Torroid respectively. c) If the
selection is ON2, the printout is similar to ON1 but in short form.
The sample printout will be as follows:
ELTEL ACTS-12K Ser. No. __________
DD/MM/YY Specimen #: +HV, NORMAL, 2 UST B, V=-----V,C=------pF,
P=------mW, PF=-----
-HV, NORMAL, 2 UST B, V=------V, C=------pF, P=-----mW,
PF=-----
FINAL, NORMAL, 2 UST B,V=-----V, C=-----pF, P=-----mW,
PF=-----
2. Sel. print: In this, three different printout selections are
available, namely 2.5kV, 10kV and Real. The operator can select any
one by pressing 2. If 2 is pressed again, the cursor will move one
position for each time.
a) If the selection is 2.5kV, the printout will be 2.5kV
equivalent
readings irrespective of the test voltage at which the
instrument is operating.
b) If the selection is 10kV, the printout will be 10kV
equivalent readings irrespective of the test voltage at which the
instrument is operating.
c) If the selection is REAL, the printout will be at the actual
test voltage at which the instrument is operating.
3. LOSS: Operator can select either Dissipation Factor (DF) or
Power Factor (PF) by pressing 3. Both PF and DF will be displayed
in absolute value. The PF and DF values are exactly equal up to 5%.
Above 5% the difference between PF and DF value is very minimal up
to 20%.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
4. LOSS VIEW: Operator can select either the absolute value or
in percentage for Dissipation Factor (DF) by pressing key 4.
5. BACK LIGHT: Press 5 to get Back light menu as shown in
Fig.3-9. And use arrow keys to increase or decrease the Backlight
of the display.
Figure 3-9
6. DATE/TIME PROPERTIES: Press 5 to enter the Date Time
Properties a) Press 1 to enter the date in DD/MM/YYYY format.
b) Press 2 to enter the time in HH : MM : SS format.
Finally when both are entered, press the enter key.
DD/MM/YYYY HH : MM : SSDATE/TIME PROPERTIES
2. TIME HH : MM : SS1. DATE DD/MM/YYYY
Figure 3-10
7. Specimen #: Press 7 to enter Serial number of the specimen. A
total of 10 digits can be entered. The entered number will be
printed out along with results.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.4 Description of different measurement modes
MEASUREMENT MODE
5. CABLE CONNECTIONS
4. SELECTIONS
3. RANGE EXTENSION
2. MEASURE EXCITATION
1. MEASURE C&DF
Figure 3-11
3.4.1 Measure C&DF In this mode the bridge first makes
Positive polarity (Forward polarity) measurement once and then it
will interchange the polarity of the power supply to HV transformer
to make the Negative polarity (reverse polarity) measurement once.
Then it will average both the readings (forward and reverse) and
will display the average as final result. In this mode of
measurement the interference suppressor circuit will get
activated.
GST BG 7
GST YG 6
GST G 5
Enter F2 CheckF1 ViewRes
4 GST YBG
3 UST
1. MEASURE C&DF
2 UST B
1 UST Y
Figure 3-12
Operator now selects the tests need to be conducted by
depressing the function key(s) adjacent to the required tests.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Where:
1. UST Y: Ungrounded Specimen Test, Measures CxH (High voltage
lead) to CxL Yellow with Ground and CxL Blue leads guarded.
2. UST B: Ungrounded Specimen Test, Measures CxH (High
voltage lead to CxL Blue with Ground and CxL Yellow leads
guarded.
3. UST YB: Ungrounded Specimen Test, Measures CxH (High
voltage lead to CxL Yellow plus High voltage lead to CxL Blue
with Ground lead guarded.
4. GST YBG: Grounded Specimen Test, Measures CxH (High
voltage lead) to CxL Yellow plus the high voltage lead toCxL
Blue plus the high voltage lead to Ground. This measurement is used
to check the total of the other three readings.
5. GST G: Grounded Specimen Test, Measures CxH (High voltage
lead to Ground with CxL Yellow and CxL Blue are guarded.
6. GST YG: Grounded Specimen Test, Measures CxH (High voltage
lead to CxL Yellow plus high voltage lead to Ground with CxL Blue
lead guarded.
7. GST BG: Grounded Specimen Test, Measures CxH (High
voltage lead to CxL Blue plus high voltage lead to Ground with
CxL Yellow lead guarded.
Each test selected is denoted by a filled-in square while
remaining tests have empty squares. Once all required tests are
selected and the Enter key is depressed, the following menu will
appear
Enter to Continue
1. MEASURE C&DF
Current : mA
Voltage : V
Figure 3-13
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OPERATION & INSTRUCTION MANUAL ACTS-12K
In this menu, voltage applied is shown and also the total
current drawn from the power source. The voltage could be varied
using the voltage control variac in the Power source. After setting
the desired voltage, depressing the Enter button executes the
desired measurement and the display appears as shown below.
Enter F2 CheckF1 Repeat
1. MEASURE C&DF UST Y Voltage : V Current : mA Capacitance :
pF Power Factor : Power : mW Frequency : Hz Interference : %
Final Result
Figure 3-14 If the High voltage is not ON because of any one of
the safety lamps is ON, then the following display will appear.
Voltage is < 5V
Enter to Continue
1. MEASURE C&DF
Current : mA
Voltage : V
Figure 3-15
The operator cannot proceed further, until the High voltage is
switched ON.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
3.4.2 Measure Excitation This mode measures excitation current
of the windings.
3.4.3 Range Extension
This mode of measurement is useful only when the operator wants
to measure higher capacitance beyond the capability of the Bridge.
To make the measurement, the operator need to connect Range
extension Transformer (CTS-RE) of ELTEL between the return path the
specimen and Cx Yellow of the bridge.
3.4.4 Selections Please refer 3.3.3
3.4.5 Cable Connections
After making connections go to the Main Menu. Press key7 to get
the cable connections screen. Press key 1 to specify where the HV
CABLE is connected to the specimen. Similarly press the
corresponding key to specify where YELLOW and BLUE cables are
connected. These selections will be printed along with the test
results of the Specimen. This option is only for printout
purpose.
3. HV CABLE : R Y B HV IV LV NONE
2. YELLOW : R Y B HV IV LV NONE
5. CABLE CONNECTIONS
1. HV CABLE : HV IV LV
Figure 3-16
3.5 SERVICE AND MAINTENANCE The components and techniques used
by ELTEL, India are mostly standard and readily understood by
competent technicians. However, some calibration and repair
procedures are very difficult to perform in the field without the
test jigs and accurate standards available to factory personnel.
Therefore customer repair and calibration are not recommended in
field / site. Please contact your ELTEL representative for service
and calibration requirement.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Chapter 4.PRECAUTIONARY MEASURES
PRECAUTIONARY MEASURES TO BE STRICTLY FOLLOWED FOR
CONNECTING HV CABLES WITH HOOKS & BATTERY CLIPS
From our past experience with several customers testing
specimens in charged 400kV / 545kV s/s , we have observed that a
proper HV cable connection is very essential in order to carry out
satisfactory Capacitance & Tan Delta measurements . Along with
the ACTS-12K Cable set, we are providing both battery Clips and
hooks at the end of the HV / LV Cable which are to be used for
connecting to various specimens. While carrying out measurements
& applying High Voltage, an improper cable connection can
result in sparks being generated at the HV end of the Cable - which
is in most cases very close to the specimen (say like a HV bushing)
where a larger cross-section of area has High Voltage flowing
through it. This has resulted in malfunction of certain critical
components / sub-assemblies etc. For e.g, usage of the HV cable
with the battery clip to connect to a 400kV HV Bushing - which is
typically at a height of approx 10mts from the floor level. Here
the chances of cable falling nearer to the bushing is more during
which time the Guard and Gnd rings of the cable are closer to the
HV point of the bushing (due to large HV area of the bushing). This
results in sparking at the specimen end of HV cable when the
voltage is increased say beyond 4kV. Due to this sparking, the
Guard and Ground potential levels of the Test Set are changed. This
results in damages to sensitive ICs & sub-assemblies in the
Bridge unit. The chances of sparking at the specimen end of the HV
cable are more while using the battery clip as against while using
the hooks. To avoid such situations, we recommend using the hooks
wherever possible. Also when the HV cable is connected to a
specimen at a height using the hook, the entire weight of the HV
cable is borne by the hook and not on the connector. This also
ensures longer cable life. By using hooks, there is enough gap
between the HV area of the bushing and the Guard & Ground rings
of the HV cable. So the chances of sparks being generated are
greatly reduced & this minimizes possible damages to the Test
Set The Hook can be connected (hanged) to the Busbars in such a way
to create more space between HV area of Bushing & the cable,
which in turn provides a
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OPERATION & INSTRUCTION MANUAL ACTS-12K
wider gap between HV to Ground & Guard points, which in turn
minimizes damages to the Test set. Only in situations where it
absolutely not possible to connect the Hooks at the specimen end,
we would recommend using the battery clip. Here also ensure that
enough precaution is taken while connecting to specimen. An
adequate gap should be there between HV point and Guard &
Ground of the HV cable. BATTERY CLIPS can ONLY be used for
connecting to specimens when there is enough scope for providing
adequate gap between the HV point, Gnd and Guard points in the
cable at the specimen end. Typically shop floor testing of Motor
/Generator Coils (usually kept at gnd level), Small Transformer
windings (where cable need not be connected a great heights) etc.
HOOKS have to be used for ALL specimens where the HV LV points are
at a height. Typical specimens are All types 400kV Bushings All
types of 400kV CTs , PTs , CVTs All Large Power & Distribution
Transformer Windings All Shunt Rector Windings All type of EHV
Circuit Breakers Both two arm and four arm. etc
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OPERATION & INSTRUCTION MANUAL ACTS-12K
ACTS-12K HIGH VOLTAGE LEAD
HIGH VOLTAGE POINT
GUARD
GUARD
HIGH VOLTAGE CABLE DETAILS The following Fig 4-1 shows the
RECOMMENDED / CORRECT ways for making the cable connections with
hooks to a HV Bushing: Connection A : The Hook can be hanged or
connected to the Neutral Bushing. Because the conduction area (HV)
is less, the chances of the Guard and Ground rings coming nearer to
the HV point are less. It is preferred to connect to neutral
bushing, if it is present in that side of the winding. Connection B
: The Hook can be hanged as shown in fig and the HV cable can be
pulled and tied to some hard contact nearby so that the Cable
should not fall close to the bushing. Make sure there is enough
space between the HV point of the bushing and Guard and Ground
rings of the HV cable. The fig also shows two WRONG / FAULTY
connections: Connection C : Here the HV clip is connected to the HV
point of the Bushing. At that time HV point and Ground and guard
rings of HV cable are very close and this invariably causes sparks
while applying high voltage. Such a connection should definitely be
avoided. Connection D : Even after using hook, if the cable is
falling close to the HV point of the bushing , this will again lead
to sparking while applying high voltage. This type of a connection
procedure should be definitely avoided.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
MORE DISTANCE
CONNECTION BGOOD
CONNECTION CBAD CONNECTION D
BAD
CONNECTION AGOOD
Fig 4-1 Different ways of HV cable connection
Cable Connection procedure for Capacitance & Tan Delta
Testing of EHV Class Transformer Bushings:
1. Make certain that the apparatus under test and the ACTS-12K
are de-energized.
2. Remove risers and/or all busbars and cables from all
bushings.
3. Leave working grounds attached to the risers and/or busbars
and cables.
4. The porcelain surface of bushings should be clean and dry.
Remove any
dirt or oil with clean dry rags.
5. Short the High Voltage bushings with a bare braided jumper
wire. The neutral or star point of a three phase transformer
winding should also be connected to the other bushings of that
winding by means of a shorting jumper. This is done to eliminate
the inductance effect of the winding and create symmetrical balance
of voltage gradient on the H and L sides of the transformer. The
jumper should be tight and should not be allowed to sag.
6. Short the Low voltage bushings with a bare braided jumper
wire. The
neutral or star point of a three phase transformer winding
should also be connected to the other bushings of that winding by
means of a shorting jumper.
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OPERATION & INSTRUCTION MANUAL ACTS-12K
7. Ensure that all neutrals are ungrounded.
8. Connect High Voltage lead of ACTS-12K with hooks to the one
of HV bushing. Preferably connect to neutral bushing, if this
winding is having neutral or star point. If not available, connect
to one of the phases of the HV bushing. Please make sure that the
HV cable (Guard and Ground) rings and sleeve of the HV cable are
not close to the HV point of the specimen. Please see the diagram
for the correct way of connection. Please refer figure 4-2 for
correct method of connection.
9. Connect ACTS-12K CxL blue lead to Tan Delta Tap of the
Bushing.
Before connecting the lead, make sure tap of the bushing is
isolated from ground. Open only Cap Tap of bushings which are under
test and all the other bushings Tan Delta taps should be in the
normal manner (Cap Taps should not be opened)
10. Connect ACTS-12K Ground cable to the tank of the
Transformer.
11. Select UST-B and conduct the measurement. Initially make a
Low Voltage
measurement (Say at 2KV for 10 KV final measurement) to ensure
that the proper connections made. If you get the correct readings
(approx) at 2KV, then proceed to High Voltage measurement say 10
KV.
HV LEAD
LV LEAD (CxL BLUE)
Fig 4-2 Cable Connection diagram for Testing of EHV class
Transformer
Bushings
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Cable connection procedure for Capacitance & Tan Delta
Testing of Windings of large Power & Distribution
Transformers:
1. Make certain that the apparatus under test and the ACTS-12K
are de-energized
2. Remove risers and/or all busbars and cables from all
bushings
3. Leave working grounds attached to the risers and/or busbars
and cables. 4. The porcelain surface of bushings should be clean
and dry. Remove any
dirt or oil with clean dry rags 5. Short the High Voltage
bushings with a bare braided jumper. The neutral
or star point of a three phase transformer winding should also
be connected to the other bushings of that winding by means of a
shorting jumper. This is done to eliminate the inductance effect of
the winding and create symmetrical balance of voltage gradient on
the H and L sides of the transformer. The jumper should be tight
& not be allowed to sag.
6. Short the Low voltage bushings with a bare braided jumper.
The neutral or
star point of a three phase transformer winding should also be
connected to the other bushings of that winding by means of a
shorting jumper.
7. Ensure that all neutrals are ungrounded.
8. Connect High Voltage lead of ACTS-12K with hook to the one of
HV
bushings. Preferably connect to neutral bushing, if the winding
is having neutral or star point. In case of absence of neutral or
star point, connect to one of the phases of the main bushing.
Please make sure that the HV cable ( Guard and Ground ) rings and
sleeve of the HV cable is not close to the HV point of the
specimen. Please refer to the earlier note on the correct
connection procedure using hooks. Please refer figure 4-3 for
correct method of connection.
9. Connect ACTS-12K CxL lead with hook to the one of LV
bushing.
Preferably connect to neutral bushing if the winding is having
neutral or star point. In case of absence of neutral or star point,
connect to one of the phases of the LV bushing connect. Here again
please make sure that the sleeve of the LV cable is not close to
the HV point of the specimen. Please refer the figure for correct
method of connection.
10. Connect ACTS-12K ground cable to the tank of the
Transformer.
11. Select UST-B and conduct the measurement to measure the
Capacitance
& Tan Delta between the HV winding to LV winding. Initially
make a low
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OPERATION & INSTRUCTION MANUAL ACTS-12K
voltage measurement (say at 2KV for a 10kV measurement) to
ensure that the proper connections made. If you get the correct
readings (approx) at 2KV, then proceed to high voltage measurement
say 10 KV.
12. Select GST-G and conduct the measurement, to measure the
insulation
between the HV winding to Ground. Initially make a low voltage
measurement (say at 2KV for 10 KV final measurement) to ensure that
the proper connections made. If you get the correct readings
(approx at 2KV), then proceed to take a High Voltage measurement at
10 KV.
LV LEAD (CxL BLUE)
HV LEAD
Fig 4-3 Cable Connection diagram for Testing of EHV class
Transformer
Windings
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Cable connection procedure for Capacitance & Tan Delta
Testing of CTs:
1. Make certain that the apparatus under test and the ACTS-12K
are de-energized
2. Open the Breakers or Isolator at both the ends of the CT to
isolate from
energized lines. This automatically reduces the amount of
Interference. The busbars from CT to Breakers or Isolators should
be as short as possible If it is of longer length, then busbars
should be removed from CT.
3. Leave working grounds attached to the risers and/or busbars
and cables.
4. The porcelain surface of CT should be clean and dry. Remove
any dirt
or oil with clean dry rags
5. Isolate the Tan Delta Tap (C point) of the CT from Ground. 6.
Connect High Voltage lead of ACTS-12K with hook to one of the
side
busbars attached to CT. Please make sure that the HV cable
(Guard and Ground) rings and sleeve of the HV cable are not close
to the HV point of the specimen. Refer figure 4-4 for correct
method of connection.
7. Connect ACTS-12K CxL Blue lead to Tan Delta Tap (C point) of
the CT.
Before connecting the lead, make sure tap of the CT is isolated
from ground.
8. Connect ACTS-12K ground cable to the tank of the CT (Ground).
9. Select UST-B and conduct the measurement. Initially make a low
voltage
measurement (say at 2KV for 10 KV final measurement) to ensure
that the proper connections made. If you get the correct readings
(approx) at 2KV, then proceed to high voltage measurement say 10
KV.
10. If Tan Delta Tap (C point) is not available, then no need to
connect any LV
cable. Connect only the HV cable and Ground cable as mentioned
above.
11. Select GST-G and conduct the measurement. Initially make a
low voltage measurement (say at 2KV for 10 KV final measurement) to
ensure that the proper connections are made. If you get the correct
readings (approx) at 2KV, then proceed to high voltage measurement
say 10 KV.
39
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OPERATION & INSTRUCTION MANUAL ACTS-12K
HV LEAD
LV LEAD (CxL BLUE)
Fig 4-4 Cable Connection diagram for Testing of Capacitance
& Tan
Delta Testing of CTs
40
-
OPERATION & INSTRUCTION MANUAL ACTS-12K
Cable connection procedure for Capacitance & Tan Delta
Testing of of Grading Capacitors in Circuit Breakers:
1. Make certain that the apparatus under test and the ACTS-12K
are de-energized
2. Open the Isolator at both the ends of the Circuit Breaker to
isolate from
energized lines. This automatically reduces the amount of
interference. The length of the busbars from Breakers to Isolators
should not be as short as possible. If it is longer, then the
busbars should be removed from Circuit Breaker.
3. Leave working grounds attached to the risers and/or busbars
and cables. 4. The porcelain surface of Circuit Breaker should be
clean and dry.
Remove any dirt or oil with clean dry rags
5. Connect High Voltage lead of ACTS-12K with hook to one of the
side busbars attached to Circuit Breaker. Please make sure that the
HV cable (Guard and Ground) rings and sleeve of the HV cable are
not close to the HV point of the specimen. Please refer figure 4-5
for correct method of connection.
6. Connect ACTS-12K CxL Blue lead to middle point of the Circuit
Breaker. 7. Connect ACTS-12K ground cable to the tank of the
Circuit Breaker
(Ground).
8. Select UST-B and conduct the measurement. Initially make a
Low Voltage measurement (say at 2KV for 10 KV final measurement) to
ensure that the proper connections made. If you get the correct
readings (approx) at 2KV, then proceed to high voltage measurement
say 10 KV.
41
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OPERATION & INSTRUCTION MANUAL ACTS-12K
HV LEAD
LV LEAD (CxL BLUE)
Fig 4-5 Cable Connection diagram for Capacitance & Tan Delta
Testing of
Grading Capacitors in Circuit Breakers
42
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OPERATION & INSTRUCTION MANUAL ACTS-12K
Cable connection procedure for Capacitance & Tan Delta
Testing of CVTs:
1. Make certain that the apparatus under test and the ACTS-12K
Test Set are de-energized
2. Open the Breakers or Isolator at both the ends of the CVT to
isolate from
energized lines. This automatically reduces the amount of
interference. The busbars from CT to Breakers or Isolators should
be as short as possible. If it is longer, then busbars should be
removed from CVT.
3. Leave working grounds attached to the risers and/or busbars
and cables.
4. The porcelain surface of CVT should be clean and dry. Remove
any dirt
or oil with clean dry rags
5. Isolate the Tan Delta Tap (HF point) of the CVT from
ground.
6. Connect High Voltage lead of ACTS-12K with hook to the one of
the side busbars attached to CVT. Please make sure that the HV
cable (Guard and Ground) rings and sleeve of the HV cable are not
close to the HV point of the specimen. Please refer figure 4-6 for
correct method of connection.
7. Connect ACTS-12K CxL blue lead to Tan Delta Tap (HF point) of
the CVT.
Before connecting the lead, make sure tap of the CVT is isolated
from ground.
8. Connect ACTS-12K ground cable to the tank of the CVT
(Ground).
9. Select UST-B and conduct the measurement. Initially make a
Low Voltage
measurement (say at 2KV for 10 KV final measurement) to ensure
that proper connections are made. If you get the correct readings
(approx) at 2KV, then proceed to high voltage measurement say 10
KV.
10. If the Capacitance and Tan Delta results are not correct,
then select GST-
BG and conduct the measurement. Initially make a low voltage
measurement (say at 2KV for 10 KV final measurement) to ensure that
the proper connections made. If you get the correct readings
(approx) at 2KV, then proceed to high voltage measurement say 10
KV.
11. If you want to test & & DF of individual stacks then
connect High Voltage
lead to the Top portion of that stack and CxL blue lead to the
bottom portion of the same stack. Select UST-B and conduct the
measurement.
12. For the bottom most stack, if the Capacitance and Tan Delta
results are
not correct, then select GST-BG and conduct the measurement.
Initially
43
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OPERATION & INSTRUCTION MANUAL ACTS-12K
make a low voltage measurement (say at 2KV for 10 KV final
measurement) to ensure that the proper connections made. If you get
the correct readings (approx) at 2KV, then proceed to high voltage
measurement say 10 KV.
HV LEAD
LV LEAD (CxL BLUE)
Fig 4-6 Cable Connection Diagram for Capacitance and Tan Delta
of CVTs
Cable connection procedure for Capacitance & Tan Delta
Testing of
Bushings of Shunt Reactor: The method is same as explained in
Cable connection procedure for Capacitance and Tan delta Testing of
EHV Class Transformer Bushings. Measurement of Capacitance &
Tan delta Testing of three Bushings mounted on the reactor can be
carried out. Cable connection procedure for Capacitance & Tan
Delta Testing of Windings of Shunt Reactor: The method is same as
explained in Cable connection procedure for Capacitance and Tan
delta Testing of Windings of large Power & Distribution
Transformers. Measurement of Capacitance & Tan delta testing of
Winding to ground can be carried out.
44
TABLEOFCONTENTS(Rev Operation).pdfTable of ContentsI.OPERATOR
SAFETY..1II.DESCRIPTION..1III.GROUNDING..1IV.POWER CORD AND
FUSES..1
WARRANTY POLICY & PREFACE.pdfWARRANTY POLICYPrefaceAbout
this manual
ACTS12K Operation Manual (RevF).pdfIIDESCRIPTIONThis instrument
must be operated, used and serviced ONLY by trained, qualified
personnel. Misuse of electrical instrument can result in personal
injury and damage to the apparatus under test. Obey all applicable
safety rules and regulations at all
times.1.1Description1.6.4COMPENSATING REACTORS
2.2Preparation for use
This Chapter provides the following informationFigure 3-2Back
Panel of Power SourceKEYS
Used for data entry.The ACTS-12K responds by beeping whenever a
key is pressedFigure 3-4Back Panel of Power SourceFigure 3-5 Main
MenuFigure 3-6Figure 3-7Figure 3-9Figure 3-10Figure 3-11Figure
3-12Figure 3-13Figure 3-14
Figure 3-15Figure 3-16
SERVICE AND MAINTENANCE
ACTS-12K HIGH VOLTAGE LEADHIGH VOLTAGE CABLE DETAILS
Fig 4-3Cable Connection diagram for Testing of EHV class
Transformer Windings
TABLEOFCONTENTS(Rev Application).pdfTable of ContentsMethod
UST16
ACTS12K Application Notes (RevF2).pdfFIGURE 2-2SHORTING THE LOW
VOLTAGE BUSHINGPlease refer 2.1 of Application Notes section.Refer
to 2.2 of Application Notes sectionFIGURE 7-1POWER SUPPLY
CAPABILITY OF THE ACTS-12KFIGURE 7-2INSULATION SYSTEM OF A SIMPLE
MACHINEFIGURE 7-3INSULATION OF A MACHINE WITH PARALLEL WINDINGS
Instrument not switching onBridge not switching onOpen interlock
indication continuously onOver voltage indication.Web:
www.eltelindustries.com
ACTS12K Application Notes (RevF2).pdfFIGURE 2-2SHORTING THE LOW
VOLTAGE BUSHINGPlease refer 2.1 of Application Notes section.Refer
to 2.2 of Application Notes sectionFIGURE 7-1POWER SUPPLY
CAPABILITY OF THE ACTS-12KFIGURE 7-2INSULATION SYSTEM OF A SIMPLE
MACHINEFIGURE 7-3INSULATION OF A MACHINE WITH PARALLEL WINDINGS
Instrument not switching onBridge not switching onOpen interlock
indication continuously onOver voltage indication.Web:
www.eltelindustries.com
TABLEOFCONTENTS(Rev Operation).pdfTable of ContentsI.OPERATOR
SAFETY..1II.DESCRIPTION..1III.GROUNDING..1IV.POWER CORD AND
FUSES..1